Collective Nouns in Indonesian grammar, also known as Kata Benda Majemuk, are used to refer to a set or group of things, people or animals. These nouns constitute a prominent part of Indonesian language, enriching its vocabulary and enhancing its expressiveness. They can represent a group of similar or dissimilar items, linking them together into a collective entity. Understanding and using these collective nouns correctly plays a vital role in mastering Indonesian grammar.